val `Kotlin` = 0
val `Котлин` = 0
val `ことりん` = 0
val `§＊！｀` = 0
val `0a0b0c` = 0
val `$a-b_c` = 0
val `with space` = 0 //illegal
val `a+b` = 0 //illegal
val `#` = 0 //illegal
val `!` = 0 //illegal
val `()` = 0 //illegal